Question

Suppose the mean IQ for a group of psychopaths is 105 and the standard deviation is 7.
Assuming a normal distribution, determine
a. The percentage of IQ scores between 100 and 110.
b. The probability of selecting a psychopath at random who has an IQ between 100 and 110.
c. The percentage of IQ scores between 90 and 105.
d. The probability of randomly selecting a psychopath who has an IQ between 90 and 105.
e. The percentage of IQ scores that are 125 or above.
f. The probability of randomly selecting a psychopath who has an IQ of 125 or above.